In this article we investigate how a psychological theory used to model perceptual learning and face recognition can be used to predict that anodal tDCS delivered over the DLPFC at Fp3 site (for 10 mins duration at 1.5 mA intensity) modulates the decision criterion, C, (and not d-prime [d']) in a target detection task. In two between-subjects and double-blind experiments (n = 112) we examined the tDCS effects on C when subjects were engaged in a target detection task, in the first instance involving artificial checkerboard stimuli (Experiment 1a), and subsequently face stimuli (Experiment 1b). The results from both experiments revealed that in the sham/control groups a significantly higher C was used when detecting a target pattern (Experiment 1a) or face (Experiment 1b) presented on a familiar rather than a random background. Importantly, anodal tDCS significantly reduced/reversed this difference between C adopted for familiar and random backgrounds in both Experiment 1a and 1b without affecting d'. These results contribute to advance our understanding of the tDCS-induced effects on stimulus representation and to the literature regarding the modulation of C. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

中文翻译：

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使用经颅直流电刺激 (tDCS) 影响目标检测范例中的决策标准。

在本文中，我们研究了用于模拟感知学习和面部识别的心理学理论如何用于预测通过 DLPFC 在 Fp3 站点（在 1.5 mA 强度下持续 10 分钟）传递的阳极 tDCS 调节决策标准 C，（而不是目标检测任务中的 d-prime [d'])。在两个受试者之间和双盲实验（n = 112）中，我们检查了受试者从事目标检测任务时 tDCS 对 C 的影响，首先涉及人工棋盘刺激（实验 1a），然后是面部刺激（实验 1b)。两个实验的结果表明，在假/对照组中，当检测在熟悉而不是随机背景上呈现的目标模式（实验 1a）或面部（实验 1b）时，使用了显着更高的 C。重要的，阳极 tDCS 显着减少/逆转了实验 1a 和 1b 中熟悉和随机背景采用的 C 之间的差异，而不会影响 d'。这些结果有助于促进我们对 tDCS 对刺激表征的影响以及有关 C 调制的文献的理解。（PsycInfo 数据库记录 (c) 2022 APA，保留所有权利）。